* {
    margin: 0;
    padding: 0;
}

html,
body {
    height: 100%;
}

.sidebar {
    position: fixed;
    left: 0;
    height: 0;
    bottom: 0;
    width: 200px;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.795);
}

.sidebar-box>li {
    height: 50px;
    width: 100%;
    text-align: center;
    line-height: 50px;
}

.sidebar-text {
    color: white;
    text-decoration: none;
}

.sidebar-box :hover {
    color: lightskyblue;
}

.sidebar-now {
    background-color: orange;
}

.head-box {
    position: absolute;
    left: 200px;
    right: 0px;
    height: 50px;
    background-color: antiquewhite;
    text-align: center;
    padding: 0px;
}

.main-box {
    position: absolute;
    border-radius: 10px;
    margin: 2px;
    border: 1px solid gray;
    padding: 5px;
    background-color: rgb(216, 205, 205);
    left: 200px;
    top: 50px;
    bottom: 0px;
    right: 0px;
}

.admin-infor {
    width: 100%;
    border: 1px solid gray;
    height: 100px;
    border-collapse: collapse;
}

.admin-infor tr {
    width: 100%;
    height: 50px;
    border-style: solid;
    border-color: gray;
    border-top: 1px;
    border-bottom: 1px;
}

.admin-infor th,
td,
th {
    font-size: x-large;
    height: auto;
    text-align: center;
    line-height: 100%;
}

.message {
    padding: 10px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
}

.message input {
    position: relative;
    width: 200px;
    height: 40px;
    opacity: 1;
    border-radius: 10px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.6) 0%, rgba(255, 255, 255, 0.6) 100%);
    border: 1px solid gray;
}

.message>span {
    width: 325px;
    height: 50px;
    height: auto;
}

.message ol {
    list-style: none;
}

.name_input {
    display: block;
    width: 300px;
}

.name_input {
    font-size: x-large;
    margin: 0, 0, 5px, 5px;
}

button {
    height: 50px;
    width: 100px;
    border-radius: 5px;
    background-color: lightseagreen;
    font-size: x-large;
}

#output_table {
    width: 100%;
    border-collapse: collapse;
}

#output_table tr {
    width: 100%;
    height: 30px;
    border: 1px solid black;
}

#output_table th,
td {
    text-align: center;
    line-height: 100%;
}